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Figure 1 Approaches for Cell Tracking by Noninvasive Imaging

Cells are labeled directly for magnetic resonance imaging (MRI), positron emission tomography (PET), single-photon emission computed tomography (SPECT), or with a reporter gene for subsequent reporter-gene imaging using either of the techniques. F18-FDG = fluorodeoxyglucose; HMPAO = exametazime; IFP = iron fluorescent particle; SPIO = super-paramagnetic iron oxide; Tc = technetium.